Located in St. Louis, MO U.S.A. Ductformer Inc. is a manufacturer of machinery for the Duct Fabrication Industry. Approximately 35 people are employed at our St. Louis facility where we have been producing machinery for the metal fabrication industry for over 20 years. Our design and engineering team, and the skilled craftsmen that build Ductformer machines have years of experience and utilize state of the art technologies, while continuously developing ideas into products that are used world-wide today.